Ship power plant is a power equipment to ensure the normal operation of the ship. It provides all kinds of energy for the ship, and uses this energy to ensure the normal navigation of the ship, the normal life of personnel and the completion of various operations. Ship power plant is all mechanical equipment that generates, transmits and consumes all kinds of energy, and it is an important part of the ship. The marine power plant includes three main parts: main power plant, auxiliary power plant and other auxiliary machines and equipment.